(S)-2-Amino-3-cyclohexyl-N-[(3S,4S)-3-hydroxy-1-(pyridine-2-sulfonyl)-azepan-4-yl]-propionamide HCl salt 、
5-三氟甲基-2-糠酸 、
戴斯-马丁氧化剂 以to give the title compound (17 mg, 6%)的产率得到5-Trifluoromethyl-furan-2-carboxylic acid {(S)-2-cyclohexyl-1-[(s)-3-oxo-1-(pyridine-2-sulfonyl)-azepan-4-ylcarbamoyl]-ethyl}-amide